Casper l



(No Model.)

O. L. REDFIELD. IMPRESSION DEVICE FOR MATRIX MAOHINES.

No. 429,738. Patented June 10, 1890.

/ lllll 514 0011 ['06 Jain- 17 UNITED STATES PATENT OFFICE.

CASPER L. REDFIELD, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR, BY MESNEASSIGNMENTS, TO THE CHICAGO MATRIX MACHINE COMPANY.

IMPRE SSION DEVICE FOR MATRIX-MACHINES.

SPECIFICATION forming part of Letters Patent No. 429,738, dated June10,1890.

Apulication filed May 1, 1889. Serial No. 309,289. (No model.)

To all whom it may concern: to a collar on the shaft 2, and its functionBe it known that I, CASPER L. REDFIELD, a is to return the nut to itsinitial position afcitizen of the United States, residing at lWIinter ithas been restrained in its rotation and neapolis,in the county ofI-Iennepin and State is again released. As will be obvious, the 5 ofMinnesota, have invented certain new and stop 8, being released fromitscatch and thrust useful Improvements in Impression Devices forward byits spring 16, will engage one of forMatrix-MakingMachines, of which thefolthe pins 7, as shown in Fig. 1, and stop the lowing is aspecification. rotation of the nut. The shaft and screw My inventionrelates to machines for formcontinuing to rotate will carry the nutdown- :0 ing matrices by the successive impressions of ward until theengaged pin has passed below separate type-dies; and its objectisimprovethe engaging stop 8, when the nut will again ment of thedevices for thrusting a plunger be free to rotate. The shaft rotation,assisted upon the dies to form the impressions in the by the force ofthe spring lat, will then carry matrix-body. the nut forward, and aprojection 17, in the 15 My improvements are illustrated in the acrearof and immediately above the pin 7, will companying drawings, in whichengage the stop-pin 8, and the projection hav- Figure 1 is a verticalsectional view of the ing an inclined face will force the stop-pin 8portion of the machine-frame, showing the backward until it has reachedthe position to impression devices in elevation. Fig. 2 is a bere-engaged by the catch 12 and held free 20 similar section showing aportion of the i'mfrom further contact with the nut or its propressiondevices in the vertical section. Fig. jection. Thus the plunger-carryingnut is 3 is a horizontal sectional View on the line cc a: permittedconstant rotation without reciproof Fig. 1, and Fig. i is also ahorizontal seccatory motion until in the operation of the tion on theline y y of Fig. 2. machine the hammer 13 is operated to free 2 5 Insaid drawings, 1 designates a portion of the catch and permit thestop-pin 8 to engage the machine-frame; 2, avertical shaft rotated oneof the pins on the nut, when immediately by means of a pulley 8. Thelower portion 4 a reciprocatory motion is produced that will of theshaft 2 is screw-threaded, and around continue during the time the nutis prevented it is a nut 5, and on the nut is formeda plunfrom rotation,and when the single downward o ger 6 for striking the type-dies (notshown) reciprocation has been made the engaging upon the descent of thenut. The shaft 2 and pins will have been released and avoid a secitsscrew 4 being rotated in the direction in- 0nd reciprocation for the oneblow of the hamdicated by the arrow .2', and being suitably mer 13.prevented from rising and the nut turning The generic features ofinvention herein 5 with it, it is obvious that upon the nut beingdisclosed are reserved to be claimed in an stopped in its rotation andthe screw continuearlier pending application filed by me April ing toturn the nut will be forced downward. 3, 1889, and Serial No. 305,882.As a means of stopping the rotation of the What I claim is nut, thereare provided at its sides pins 7, 1. In an impression deviceforamatriX-ma- 0 having fiat surfaces at the one side, and to chine, ascrew-threaded shaft, a nut thereon engage these pins a spring-actuatedstop 8 is carrying a plunger, means for stopping the locatedin therecess 9 in the wall of the frame. nut rotations to produce plungerthrusts, and The stop 8 is carried on a rod 10, that has a aspringconnecting the shaft and nut, adapted head 11, which is engaged by aspring-catch to return the latter to its initial position upon 5 5 12.The spring-catch is released from engage the completion of a thrust,substantially as ment with the head by means of a knocker set forth. 13,that may be actuated at the desired mo- 2. In an impression device formatrix-makment by any suitable mechanism connected ing machine, a rotaryshaft havinga threaded with the operative parts of the machine. The end,anut thereon carrying a plunger, a spring too 50 nut 5 is connectedto-one end of a spring 14, connecting the nut and shaft, projections onand the other end of the spring is attached the nut, a spring-stop forengaging the nut,

and project-ions on the nut for engaging and trneting the nut,andsuitable means provided removing the stop, substantially as setforth. on the nut to return the stop to initial posi- In an impressiondevice for n nmtrixtion, substantially as set forth.

machine, a rotating shaft having a threaded end, a nut thereon carryinga plunger, 21 reciprocating stop for en gaging the nut to cause it tomake plunger thrusts, aspring for re- (JASPER L. RE'DFIEL'D. \Vitnesses:

P. II. GUNCKEL, E. M. SCHUMANN.

